A dragline boom device

Abstract

The application provides a shovel dipper stick device for connecting and supporting a shovel, comprising a first dipper stick and a second dipper stick arranged side by side, the end of the first dipper stick and the end of the second dipper stick are connected with dipper stick supports, the two dipper stick supports are symmetrically arranged and fixedly connected through a connecting cylinder, the dipper stick support comprises a first connecting end connected with the dipper stick, a second connecting end and a third connecting end connected with a shovel connecting rod, and a connecting column connected with the connecting cylinder, wherein the connecting column is integral with the first connecting end, the second connecting end and the third connecting end. The dipper stick support is a cast part without a welding seam, when the load applied by the shovel is borne, the load of the dipper stick support is not concentrated in the welding seam area, the stress can be applied on the cast part body, and the structural cracking caused by welding can be reduced. Therefore, the overall load bearing property of the dipper stick support is good, the fatigue strength is high, and the dipper stick support can also bear a large load and is not easy to be damaged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, and in particular to a device for an electric shovel dipper stick. BACKGROUND

[0002] As a core mining equipment in open-pit mining operations, the electric shovel undertakes the key task of excavation. Among them, the dipper stick is one of the core components in the electric shovel excavation operation, and its main function is to connect and support the dipper, and at the same time transmit the force generated by the pushing mechanism to the dipper. Specifically, the front end of the dipper stick is fixedly connected with the dipper through an ear block structure, and the dipper teeth of the dipper stick are engaged with the corresponding dipper teeth on the jib saddle. In the process of excavation, the dipper stick moves backward under the drive of the pushing system to help the dipper fill with material, and the dipper completes the excavation action under the synergistic action of the pushing force and the lifting force.

[0003] At present, the working device of the electric shovel dipper stick generally adopts a tailor-welded structure. However, the weld quality of the tailor-welded structure is extremely susceptible to external environmental factors and human operation factors, and the tailor-welded structure is difficult to ensure the consistency of the welding process, resulting in fluctuations in the welding quality, and further affecting the overall performance and service life of the dipper stick. Through finite element simulation analysis technology, the dipper stick head bears a large stress concentration at the weld. In the case where the consistency of the weld quality cannot be effectively guaranteed, the weld poses a serious threat to the overall performance and service life of the dipper stick. SUMMARY

[0004] In order to solve the technical problems existing in the prior art, the present application provides an electric shovel dipper stick device for connecting and supporting a dipper, comprising a first dipper stick and a second dipper stick arranged side by side, the end portions of the first dipper stick and the second dipper stick are connected with dipper stick supports, the two dipper stick supports are symmetrically arranged and fixedly connected through a connecting cylinder therebetween, the dipper stick support comprises a first connecting end connected with the dipper stick, a second connecting end and a third connecting end connected with a dipper connecting rod, and a connecting column connected with the connecting cylinder, wherein the connecting column is integral with the first connecting end, the second connecting end and the third connecting end.

[0005] Further, the first connecting end is fork-shaped, comprising a first fork arm, a second fork arm, and a first connecting plate and a second connecting plate connected between the first fork arm and the second fork arm, the connecting plates near the first fork arm and the second fork arm are smooth curved surfaces, and the curvature of the curved surface near the first fork arm is greater than the curvature of the curved surface near the second fork arm.

[0006] Further, the first connecting plate and the second connecting plate are parallel to each other, and the first connecting plate and the second connecting plate are integral with the connecting column.

[0007] Further, the outer edges of the first connecting plate and the second connecting plate are provided with first welding grooves, and the angle of the first welding grooves is 45°.

[0008] Further, the inner edges of the first connecting plate and the second connecting plate are provided with second welding grooves, and the angle of the second welding grooves is 45°.

[0009] Further, the second connecting end comprises a first rib plate and a second rib plate arranged in parallel, and the distal ends of the first rib plate and the second rib plate are provided with coaxial first connecting holes.

[0010] Further, the two sides of the first connecting hole are provided with protruding flange tables.

[0011] Further, the third connecting end is an ear block, the distal end of the ear block is provided with a second connecting hole, and the side of the ear block close to the connecting column is a machining reference surface.

[0012] Further, the connecting column is located in the middle of the arm support, and the middle of the connecting column is a weight-reducing hole, wherein the weight-reducing hole is a through hole.

[0013] Further, the outer edge of the connecting column is provided with a third welding groove, and the outer bottom is circumferentially provided with an annular reinforcing rib.

[0014] Further, the arm support is a cast part.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] 1. The arm support of the application is a cast part, and the cast part has no welding seam. When bearing the load applied by the bucket, the arm support has no load concentrated in the welding seam area, and the stress can be applied to the cast part body, thereby reducing the structural cracking caused by welding. Therefore, the overall load bearing property of the arm support is good, the fatigue strength is high, and the arm support can also bear a large load and is not easy to be damaged.

[0017] 2. The surface of the first connecting end of the arm support of the application connected with the arm is a curved surface structure, which not only improves the fit between the arm and the arm support, reduces the stress concentration of the arm support, makes the load bearing properties of each part of the first connecting end more uniform, and improves the load bearing capacity of the arm support. At the same time, this structure also optimizes the welding process, so that the welding process is smoother and the welding seam is more firm. The curvature of the curved surface of the connecting plate close to the first fork arm is greater than the curvature of the curved surface of the connecting plate close to the second fork arm, so that the different direction forces and torques applied by the bucket to the arm support can be better dispersed and borne, thereby improving the load bearing capacity and stability of the entire structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1Structure diagram of the bucket rod device of the present application;

[0019] Figure 2 Structure diagram of the bucket rod device of the present application;

[0020] Figure 3 Structure diagram of the bucket rod device of the present application;

[0021] Figure 4 Structure diagram of the bucket rod device of the present application;

[0022] Figure 5 Structure diagram of the bucket rod device of the present application;

[0023] Figure 6 Structure diagram of the bucket rod device of the present application; Figure 5 Structure diagram of the bucket rod device of the present application;

[0024] Structure diagram of the bucket rod device of the present application;

[0025] 1, first bucket rod; 2, second bucket rod; 3, connecting cylinder; 4, bucket rod support; 41, first connecting end; 411, first fork arm; 412, second fork arm; 413, first connecting plate; 414, second connecting plate; 415, curved surface; 416, first welding groove; 417, second welding groove; 42, second connecting end; 421, first reinforcing plate; 422, second reinforcing plate; 423, first connecting hole; 424, flange table; 43, third connecting end; 431, second connecting hole; 432, reference surface; 44, connecting column; 441, lightening hole; 442, reinforcing rib; 443, third welding groove; 5, vertical plate; 6, blocking plate; 7, rack; 8, baffle. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] The present application is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect thus defined can be combined with any other aspect or aspects, unless explicitly stated otherwise. In particular, any feature that is considered to be a preferred or advantageous feature can be combined with other feature or features that are considered to be preferred or advantageous.

[0028] As used in the present application, "first", "second", and similar terms do not denote any order, quantity, or importance, but are only used to distinguish different parts. "Include" or "contain" and similar terms mean that the elements before the word encompass the elements listed after the word, and do not exclude the possibility of also encompassing other elements.

[0029] In the description of the present application, it should be understood that the terms "inner", "outer", "upper", "lower", "left" and "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0030] Reference Figures 1-2 As shown, the present application discloses a kind of electric shovel dipper stick device, for connecting and supporting bucket, including juxtaposition first dipper stick 1 and second dipper stick 2, first dipper stick 1 and second dipper stick 2 The structure is identical, and is all enclosed by vertical plate 5 and baffle 6 The long strip box structure, baffle 6 upper end is equipped with rack 7 engaged with bucket tooth on the saddle of hoisting arm, the end of rack 7 is equipped with stop plate 8 for limiting function. The end of first dipper stick 1 and second dipper stick 2 is connected with dipper stick support 4, two dipper stick supports 4 are symmetrically arranged and are fixedly connected between two dipper stick supports 4 by connecting barrel 3, dipper stick support 4 includes first connecting end 41 connected with dipper stick, second connecting end 42 and third connecting end 43 connected with connecting rod, connecting column 44 connected with connecting barrel 3, wherein connecting column 44 is integral with first connecting end 41, second connecting end 42 and third connecting end 43.

[0031] In some embodiments, dipper stick support 4 is a cast piece, and the cast piece has no weld, when bearing the load applied by bucket, dipper stick support 4 has no load concentrated in the weld area, can act stress on the body of cast piece, can reduce structural cracking caused by welding. Therefore, the overall load bearing property of dipper stick support 4 is good, the fatigue strength is high, and it can also bear a large load and is not easy to be damaged.

[0032] In some embodiments, reference Figures 3-6As shown, the first connecting end 41 of the arm bracket 4 is welded to the arm, and the first connecting end 41 is fork-shaped, which not only enhances the stability of the connection, but also facilitates welding with different components. Specifically, the first connecting end 41 includes a first fork arm 411 and a second fork arm 412 welded to the blocking plate 6, and a first connecting plate 413 and a second connecting plate 414 connected between the first fork arm 411 and the second fork arm 412, and the first connecting plate 413 and the second connecting plate 414 are used for welding with the vertical plate 5. The first connecting plate 413 and the second connecting plate 414 are both smooth curved surfaces 415 near the first fork arm 411 and the second fork arm 412, and the curvature of the curved surface 415 near the first fork arm 411 of the connecting plate is greater than the curvature of the curved surface 415 near the second fork arm 412 of the connecting plate. The curved surface structure not only improves the fit between the arm and the arm bracket 4, reduces the stress concentration phenomenon of the arm bracket 4, makes the load-bearing characteristics of each part of the first connecting end 41 more uniform, and improves the load-bearing capacity of the arm bracket 4. At the same time, this structure also optimizes the welding process, making the welding process smoother and the weld more secure. Among them, the curvature of the curved surface 415 near the first fork arm 411 of the connecting plate is greater than the curvature of the curved surface 415 near the second fork arm 412 of the connecting plate, which can better disperse and withstand the different directions of force and torque exerted by the bucket on the arm bracket 4, thereby improving the load-bearing capacity and stability of the entire structure.

[0033] In some embodiments, the first connecting plate 413 and the second connecting plate 414 are parallel to each other, and the outer edges of the first connecting plate 413 and the vertical plate 5 (i.e., the outer edges of the first connecting plate 413 and the vertical plate 5) and the outer edges of the second connecting plate 414 and the vertical plate 5 are provided with first welding grooves 416, which not only facilitate the welding operation, but also improve the quality and strength of the weld. Similarly, the inner edges of the first connecting plate 413 and the vertical plate 5 (i.e., the inner edges of the first connecting plate 413 and the vertical plate 5) and the inner edges of the second connecting plate 414 and the vertical plate 5 are provided with second welding grooves 417. The angle of the first welding groove 416 and the angle of the second welding groove 417 can be selected according to actual conditions, for example, the angle of the first welding groove 416 and the angle of the second welding groove 417 can be 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc. Preferably, the angle of the first welding groove 416 and the angle of the second welding groove 417 are 45°. The welding groove of 45° is neither too steep to be filled, nor too flat to reduce the cross-sectional strength of the weld.

[0034] In some embodiments, the second connecting end 42 comprises a first rib plate 421 and a second rib plate 422 arranged in parallel, and the ends of the first rib plate 421 and the second rib plate 422 are provided with first connecting holes 423 for connecting with the connecting rod of the bucket. The axes of the first connecting holes 423 on the first rib plate 421 and the second rib plate 422 coincide. The inner and outer sides of the first connecting holes 423 on the first rib plate 421 and the second rib plate 422 are provided with protruding flange tables 424. These flange tables increase the thickness of the material around the connecting holes, thereby improving the load capacity and durability of the connecting holes.

[0035] In some embodiments, the third connecting end 43 is an ear block, and the end of the ear block is provided with a second connecting hole 431 for connecting with the connecting rod of the bucket. The side of the ear block close to the connecting column 44 is a machining reference surface 432.

[0036] In some embodiments, the connecting column 44 is located in the middle of the arm bracket 4, and the middle of the connecting column 44 is provided with a weight-reducing hole 441, which is a through hole. The weight-reducing hole 441 can make the arm bracket 4 lighter under the premise of ensuring the load capacity of the arm bracket 4, which is conducive to realizing lightweight. The outer edge of the connecting column 44 is provided with a third welding bevel 443, and the connecting column 44 is connected with the connecting cylinder 3 in an all-penetration welding manner. The third welding bevel 443 not only facilitates the welding operation, but also improves the quality and strength of the weld, and improves the strength and stability of the connection between the arm bracket 4 and the connecting cylinder 3.

[0037] In some embodiments, the outer side of the connecting column 44 is circumferentially provided with a reinforcing rib 442, which further enhances the structural strength and stability of the arm bracket 4, thereby improving the load capacity of the entire arm bracket 4, prolonging the service life of the arm bracket 4, and reducing the cost of maintenance and replacement.

[0038] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric shovel bucket arm device for connecting and supporting a bucket, characterized in that: The invention comprises a first bucket arm (1) and a second bucket arm (2) arranged in parallel, wherein the ends of the first bucket arm (1) and the second bucket arm (2) are both connected to a bucket arm support (4), the two bucket arm supports (4) are symmetrically arranged and fixedly connected to each other via a connecting tube (3), the bucket arm support (4) comprises a first connecting end (41) connected to the bucket arm, a second connecting end (42) and a third connecting end (43) connected to a bucket link, and a connecting column (44) connected to the connecting tube (3), wherein the connecting column (44) is integrated with the first connecting end (41), the second connecting end (42) and the third connecting end (43); The first connecting end (41) is fork-shaped and includes a first fork arm (411), a second fork arm (412), and a first connecting plate (413) and a second connecting plate (414) connected between the first fork arm (411) and the second fork arm (412); the connecting plate has smooth curved surfaces (415) near the first fork arm (411) and the second fork arm (412); and the curvature of the curved surface (415) near the first fork arm (411) is greater than the curvature of the curved surface (415) near the second fork arm (412); A first welding groove (416) is provided at the outer edges of the first connecting plate (413) and the second connecting plate (414), and the angle of the first welding groove (416) is 45°; A second welding groove (417) is provided at the inner edges of the first connecting plate (413) and the second connecting plate (414), and the angle of the second welding groove (417) is 45°; The arm support (4) is a casting.

2. The electric shovel bucket arm device according to claim 1, characterized in that: The first connecting plate (413) and the second connecting plate (414) are parallel to each other, and the first connecting plate (413) and the second connecting plate (414) are integrated with the connecting column (44).

3. The electric shovel bucket arm device according to claim 1, characterized in that: The second connecting end (42) comprises a first rib plate (421) and a second rib plate (422) arranged in parallel, and ends of the first rib plate (421) and the second rib plate (422) are provided with a coaxial first connecting hole (423).

4. The electric shovel bucket arm device according to claim 3, characterized in that: Both sides of the first connecting hole (423) are provided with raised flange platforms (424).

5. The electric shovel bucket arm device according to claim 1, characterized in that: The third connecting end (43) is an ear block, a second connecting hole (431) is provided at the end of the ear block, and a side of the ear block close to the connecting column (44) is a processing reference surface (432).

6. The electric shovel bucket arm device according to claim 1, characterized in that: The connecting column (44) is located in the middle of the boom support (4), and a weight-reducing hole (441) is located in the middle of the connecting column (44), wherein the weight-reducing hole (441) is a through hole.

7. The electric shovel bucket arm device according to claim 6, characterized in that: A third welding groove (443) is provided at the outer edge of the connecting column (44), and an annular reinforcing rib (442) is provided circumferentially on the outer bottom.

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